code: def tearDown(self) -> None:
      self.model.close()
  
file_path: nboost/tests/unit/test_pt_bert_model.py
imports: from nboost.plugins import resolve_plugin
  from nboost import defaults
  import unittest
  from random import shuffle
label_desc: Use image node_id 4 for calling the TestPtTransformersRerankPlugin obj's underlying member method code with example usage: obj.tearDown() without return types